This feature was removed recently, and there unfortunately does not seem to be an add-on for re-enabling it. The good news is that you will probably get used to it before you know it. It took me a week or so, but actually prefer the way it works now.

This feature was [https://bugzilla.mozilla.org/show_bug.cgi?id=712772 removed] recently, and there unfortunately does not seem to be an add-on for re-enabling it. The good news is that you will probably get used to it before you know it. It took me a week or so, but actually prefer the way it works now.